On 1/8/2019 6:48 AM, NDJORE BORIS wrote: > When I build ffmpeg with gcc4.9 on ubuntu 16.04 I have this error: > ffmpeg/libavcodec/idctdsp.h:23:20: fatal error: config.h: No such file or > directory. > > How can I fixe this, please? Did you run ./configure first? If so, please include it's full output. z!